Uranium Ore Conglomerate
Ted Kinsman
Fly Ranch Geyser, Gerlach, Nevada
Theodore Clutter
Nodding Donkey Oil Pumps #2
Inga Spence
Petrified Wood
Ted Kinsman
De Re Metallica, Title Page, 16th
Science Source
Red-and-green Macaw Ara Chloroptera
Gerard Lacz
Petrified Wood Tree Trunk Section #4
Millard H. Sharp
Black Opal Bracelet
Joel E. Arem
Two Karat Diamond #1
Raul Gonzalez Perez
De Re Metallica, Metallurgy Workshop
Science Source
Lucky Friday
Theodore Clutter
Rocks And Minerals #1
Photo Researchers
Muscovite Mica
Andrew J. Martinez
Pink Tourmaline
Millard H. Sharp
Gold From The Forest Hill District
Joel E. Arem
Granite With Quartz Inclusions
Ted Kinsman
Radiation From Uranium Ore Conglomerate
Ted Kinsman
Radiation From Uranium Ore Conglomerate #1
Ted Kinsman
Granite With Quartz Inclusions #1
Ted Kinsman
Radiation From Uranium Ore Conglomerate #2
Ted Kinsman
Granite With Quartz Inclusions #2
Ted Kinsman
Radiation From Uranium Ore Conglomerate #3
Ted Kinsman
Soda Straw Cave Formation
Dante Fenolio
Hydroxyapatite
Scott Camazine
Turkey Tail Fungi
Robert and Jean Pollock
Mineral Source Of Asbestos
Dee Breger
Mineral Bornite
A.b. Joyce
Mineral Howlite
A.b. Joyce
Mineral Leaching From Hot Springs #1
James Steinberg
Minerals In Mica, Lm
Winton Patnode
Minerals In Mica, Lm #1
Winton Patnode
Mineral Leaching From Hot Springs
James Steinberg
Diopside In Uv Light #1
Ted Kinsman
Australian Opal #2
Millard H. Sharp
Lake Superior Agate #1
Ted Kinsman
Australian Opal #7
Millard H. Sharp
Australian Opal #1
Millard H Sharp
Lapis Lazuli
Millard H. Sharp
Carrara Marble Quarry, 20th Century
Photo Researchers
Hanging Lake in Colorado
Sean Bagshaw
Laguna Agate
Millard H. Sharp
Amethyst Geode #1
Millard H. Sharp
Lime Green Calcite #1
Millard H. Sharp
Silver Mining
Theodore Clutter
Mexican Lace Agate
Louise K. Broman
Tourmaline Elbaite From Brazil
Joel E. Arem
Laguna Lace Agate
Mark Windom
Laguna Lace Agate, Macro
Mark Windom
Agate From Brazil, Lm #16
Bernardo Cesare
Two Karat Diamond
Raul Gonzalez Perez
Peridot Crystals
Millard H. Sharp
Blue Cheese, Sem #3
Ted Kinsman
Tangerine Quartz Crystals #2
Millard H. Sharp
Amethyst Crystals #3
Millard H. Sharp
Topaz From The Thomas Range, Utah
Joel E. Arem
Plume Agate Details, Close
Mark Windom
Agate From Brazil, Lm #14
Bernardo Cesare
Minnetonka Cave #1
William H. Mullins
Oil Well Pumps And Storage Tanks
Inga Spence
Spherical Magnetite Nanoparticle
NIST/Science Source
Diamonds #3
Phillip Hayson
Laguna Lace Agate, Closeup
Mark Windom
Georgius Agricola, German Scholar #1
Science Source